Window-ventilator.



J. A. STEVENS.

WINDOW VENTILATOR.

APPLICATION FILED NOV,5, 1908.

926,61 '7, Patented June 29, 1909.

g D Snucnfoz atkumug UNITED STATES PATENT OFFICE.

JAMES A. STEVENS, OF NEWBURYPORT, MASSACHUSETTS.

WINDOW-VENTILATOR.

- buryport, in the county of Essex and State of Massachusetts, have invented certain new and useful Improvements in Window-Ventilators, of which the following is a specification.

This invention relates to window ventila- I tors, and has specially in view certain new and useful improvements therein whereby the same may be readily fitted to any size of window casing without the use of fastening means, and which is so constructed that it will not interfere with the raising or lowering of the window to regulate the amount of air admitted to the room, and at the same time serve as a screen to prevent the entrance of rain, snow, or the like.

In carrying out the objects of the invention enerally stated above it will be understood ofcourse that the essential features are susceptible ofstructural changes and modifications of details, but a preferred and practical embodiment of the same is shown in the accompanying drawings, wherein- Figure 1 is a perspective view of a window casing showing the improved ventilator therein. Fig. 2 is a pers ective view of the frame of the ventilator, t e covering thereof being removed. Fig. 3 is a horizontal sectional view taken on the line 33, Fig. 1.

Like characters of reference designate corresponding parts.

In the accompanying drawings, 10 desig-.

na'tes a window casing of the usual type as seen from the interior of a room, and 11 designates the improved ventilator mounted within the same.

As will be seen by-reference to Fig. 2 of the accompanying drawings, the said ventilator 11' is composed of two duplicate frame sections 12-13, each of which is constructed from a single length of wire, bent to form a vertically arranged side member 14 having an inturn'ed, horizontally arranged base extension 15 the end of which is adjustably mounted within a sleeve 16, having set screw or equivalent fastening! means t6 assi'ng theremto to enga e wit and retain t e base extensions of bot frame sections in the de- Specification of Letters Patent.

Application filed November 6, 1908.

Patented June 29, 1909.

Serial N0. 461,212.

sired adjusted position in said sleeve. The upper end of said side member 14 of each frame section terminates in an outwardly bowed, horizontally arranged top member 17 having an ad'ustable engagement with a sleeve 18, provi ed with set screw or equivalent fastenings 19 for retaining said end ortion in the desired, or necessary adjuste position within said sleeve 18.

Upright brace rods 20-21 connect the base extensions 15 with the upper outwardly bowed members 17, said brace rods being also of wire, and preferably arranged adjacent to each end of the sleeves 16 and'18.

A frame covering 22 is suitably secured over each frame section, said covering being of any suitable weatherproof and waterproof material, and may be ornamented.

In fitting the improved ventilator to a window casing, the frame sections are adjusted to the required size, and the frame is contracted slightly to permit of its being sprung into engagement with the side of the casing and the. sill, and to be held in such engagement by the expansive force of the said frame. 'This described engagement between the said frame and the casing obviates the use of disfiguring fasteners, or the employment of holding flanges, as will be obvious.

Another prominent feature of the invenmember 'for engagement with the window .frame, a straight lower member, and an outwardly bowed upper member, means for 'adjustably connecting said upper and lower frame members, and a covering for the entire frame structure.

2. A ventilatorfor windows com rising two U-shaped frame sections each ormed of a single length of resilient material bent to rovide a vertical side member having an mturned horizontally arranged lower end portion and an outwardly bowed upper end In testimony whereof I hereunt o afl'lxmy lmrtion, coupling]; sleeves for 110mm? the signature in thepresence of two wltnesses.

)ewed upper ems and the inturned ower ends, respectively, in adjustable relations, JAMES STEVENS 5 brace rods connecting the upper portion and Witnesses:

lower omon oi the frame sectlons, and. a CHARLES A. Sroommm, cevermg nmterml for each frame seetlon. GEORGE C. STOCKMAN. 

